Best facial serum from Korea

This is my empty bottle of Bergamo pure snail brightening ampoule by L.K. Cosmetics. I used it twice a day: morning and evening after a softening lotion and before moisturizer. One ampoule lasts about three weeks. The package has 4 of them.
After one week I noticed tremendous improvements -adult acne was gone, skin became plump, glowing and brighter. It also tightens the pores, making skin look younger. This serum became my everyday routine for a while, as it is highly effective.